GH4169 is a precipitation-strengthened nickel-based superalloy with good comprehensive properties in the temperature range of -253 to 650 °C.
The yield strength below 650 °C ranks first in the deformed superalloy, and it has good fatigue resistance, radiation resistance and Oxidation, corrosion resistance, and good processability, good welding performance.
It can manufacture various parts with complex shapes, and has been widely used in the above temperature range in aerospace, nuclear energy, petroleum industry and extrusion dies.
Another feature of the alloy is that the alloy structure is particularly sensitive to the hot working process.
Mastering the law of phase precipitation and dissolution in the alloy and the relationship between the structure, process and performance can make reasonable and feasible process regulations for different use requirements.
Get a wide range of parts for different strength levels and usage requirements.
The varieties supplied are forgings, forged bars, rolled bars, cold rolled bars, round cakes, rings, plates, strips, wires, tubes, etc. It can be made into parts such as discs, rings, blades, shafts, fasteners and elastic elements, sheet metal structural parts, and casings for long-term use in aviation.
Material grade
GH4169 (GH169)
Similar grades
Inconel718 (USA), NC19FeNb (France)
Technical standard
GJB 2612-1996 "Specification for high temperature alloy cold drawing wire for welding"
HB 6702-1993 "GH4169 alloy bar for WZ8 series"
Q/6S 1034-1992 "GH4169 Alloy Bars for High Temperature Fasteners"
Q/3B 548-1996 "GH4169 Alloy Forgings"
Q/3B 548-1996 "GH4169 Alloy Forgings"
Q/3B 4048-1993 "YZGH4169 Alloy Bar"
Q/3B 4050-1993 "GH4169 Alloy Plate"
Q/3B 4051-1993 "GH4169 Alloy Wire"
GB/T14992-2005 "Superalloy"
Chemical composition
The chemical composition of the alloy is divided into three categories: standard composition, high-quality composition, and high-purity composition, as shown in Table 1-1. High-quality components reduce carbon and increase niobium on the basis of standard components, thereby reducing the number of niobium carbides, reducing the number of fatigue sources and strengthening phases, increasing the content of anti-fatigue, and improving the purity and comprehensive properties of the material.
The GH4169 alloy for nuclear energy applications needs to control the content of boron (other elements remain unchanged). When ω(B)≤0.002%, in order to distinguish it from the GH4169 alloy used in the aerospace industry, the alloy grade is GH4169A.
Alloy % Nickel Chromium Iron Molybdenum Niobium Carbon Manganese Silicon Sulfur Copper Aluminum Titanium Boron
GH4169 Min 50 17 Margin 2.8 4.75 0.20 0.65
Maximum 55 21 3.3 5.50 0.08 0.35 0.35 0.015 0.30 0.80 1.15 0.006
Physical properties of GH4169:
Density 8.24 g/cm3
Melting point 1260-1320 ºC
Minimum mechanical properties of GH4169 alloy at room temperature:
Alloy Tensile Strength Rm N/mm² Yield Strength Rp0.2 N/mm² Elongation A5 % Brinell Hardness HB
Solution treatment 965 550 30 ≤363
GH4169 alloy has the following properties:
1. Ease of processing
2. High tensile strength, fatigue strength, creep strength and rupture strength at 700ºC
3. High oxidation resistance at 1000ºC
4. Stable chemical properties at low temperature
5. Good welding performance
Metallographic structure of GH4169:
The GH4169 alloy has an austenitic structure, and the γ" phase formed after precipitation hardening gives it excellent mechanical properties. The δ phase formed at the grain boundary during the heat treatment process makes it have the best plasticity.
Corrosion resistance of GH4169:
Regardless of high temperature or low temperature environment, GH4169 alloy has excellent resistance to stress corrosion cracking and pitting corrosion. The oxidation resistance of GH4169 alloy at high temperature is particularly excellent.
GH4169 Application Scope Application areas are:
Due to its high temperature strength at 700°C, excellent corrosion resistance and ease of processing, GH4169 can be widely used in various high-demand occasions.
1. Steam turbine
2. Liquid fuel rockets
3. Cryogenic Engineering
4. Acid environment
5. Nuclear Engineering
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